diff --git a/Cargo.toml b/Cargo.toml
index 3244fb1..0d41f69 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -34,7 +34,7 @@ serde_with = "3.6.1"
 josekit = "0.8.4"
 async-trait = "0.1.80"
 anyhow = "1"
-indexmap = "2.6.0"
+indexmap = "2"
 
 [dev-dependencies]
 tokio = { version = "1.38.1", features = ["macros", "rt-multi-thread"] }